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Title:line Lists For The b1Σ+x3Σ And a1∆−x3Σ Transitions Of So
Author(s):Johnson, Ryan
Contributor(s):Liévin, Jacques; Bernath, Peter F.
Abstract:SO is an important radical found in many astronomical sources such as the atmosphere of Io and the atmosphere of Venus. In order to create more complete line lists, we fit spectroscopic data on SO from the literature using PGOPHER. The fits covered v=0 to v=6 for the X$^3\Sigma^-$ state, v=0-5 for the a$^1\Delta$ state and v=0-2 for b$^1\Sigma^+$ state. The $B_v$ and $G_v$ polynomial coefficients for each state were input into LeRoy’s RKR program to produce pointwise potential energy curves. High level \textit{ab initio} calculations, including spin-orbit coupling, were carried out to obtain the electric transition dipole moment functions for the nominally forbidden b$^1\Sigma^+- $X$^3\Sigma^-$ and a$^1\Delta- $X$^3\Sigma^-$ transitions. The RKR potentials and transition dipole moment points were input into LeRoy’s LEVEL program to calculate the transition dipole matrix elements for all possible b-X and a-X bands. For the b$^1\Sigma^+- $X$^3\Sigma^-$ transition, the electric and magnetic transition dipole matrix elements were scaled using the experimental values of $\mu_0$ = 0.0107 D, $\mu_1$ = -0.0119 D and M = 0.16 $\mu_B$ obtained by Setzer \textit{et al.}\footnote{K.D. Setzer, E.H. Fink, and D.A. Ramsay, High-resolution Fourier transform study of the b$^1\Sigma^+- $X$^3\Sigma^-$ and a$^1\Delta- $X$^3\Sigma^-$ transitions of SO, \textit{J. Mol. Spectrosc.} \textbf{198}, 163-174 (1999).} for the 0-0 band. The transition dipole moment matrix elements were used in PGOPHER to produce our line lists for the b$^1\Sigma^+- $X$^3\Sigma^-$ and a$^1\Delta- $X$^3\Sigma^-$ transitions. \\
Issue Date:2021-06-24
Publisher:International Symposium on Molecular Spectroscopy
Genre:Conference Paper / Presentation
Date Available in IDEALS:2021-09-24

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